Al-Khulafa'u ar-Rasyidun min tarikh al-Islami

 Az Zahabi, Muhammad bin Ahmad bin Usman;

Beirut : Dār al-Kutub al-ʿIlmiyyah , 1988

Al-Khulafa'u ar-Rasyidin / Abdul-Wahab an Najjar

 An Najjar, Abdul; Wahab;

Beirut : Dār al-Kutub al-ʿIlmiyyah , 1990